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(No Model.) 2 Sheets-Sheet 1.

w. L. DENIO. NOZZLE FOR INJEGTING STEAM INTO FURNACES. No. 564,873.Patented July 28, 1896.

Fig. 1. Fig. 2.

Witnesses. V Inventor m: norms-Pains o0, Pnmoumoq wumxsmn. a. c.

'(No Model.) 2 Sheets-Sheet 2, W. L. DENIO. NOZZLE FOR INJEGTING STEAMINTO FURNACES. No. 564,873. Patented July 28,1896] Inventor.

A e La Attorney.

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wwm 5.7 LDCa-M UNITED STATES PAT NT OFFICE.

VILLIAM L. DENIO, OF ROCHESTER, NElV YORK, ASSIGNOR TO THE DENIO SMOKECONSUMER COMPANY.

NOZZLE FOR INJECTING STEAM INTO FURNACES SPECIFICATION forming part ofLetters Patent No. 564,873, dated July 28, 1896.

Application filed January 13, 1896. Serial No. 575,401. (No model.)

T all whom it may concern:

Be it known that 1, WILLIAM L. DENIO, a citizen of the United States,and a resident of the city of Rochester, in the county of Monroe andState of New York, have invented a certain new and useful Nozzle forInjecting Steam or Air into Furnaces, of which the following is aspecification, reference being had to the accompanying drawings, inwhich Figure l is a side elevation of one of my nozzles. Fig. 2 is avertical section thereof. Fig. 3' is a top plan view. Fig. 4 is a frontelevation of a furnace, showing the pipe devices which I use inconnection with my nozzle. Fig. 5 shows a view of a mechanism forcontrolling the supply of vapor or gas, and Fig. 6 is an enlargedvertical section on the line 6 6 of Fig. 5.

In order to produce more perfect combustion of fuel in furnaces and toprevent the product-ion of smoke therefrom, it is well known that theinjection of steam or air or any other oxidizing vapor or gas into thefirespace above the grate, at the time when a fresh charge of fuel isplaced upon the grate and for a short time thereafter, is a sufficientmeans of effecting the-desired result. The great difficulty, however, inthe use of such apparatus has always been that the tip or nozzle of theinjector itself quickly burns off in the high heat to which it isexposed, and, in cases where the water used in the boiler is chargedwith sediment, the slots or perforations through which the injectionoccurs become filled with sediment or incrustration, thus at timeshastening the deterioration of the nozzle. In order to obviate thesedifiiculties, and to provide a nozzle which shall have a long life inthe high heat of the furnace, I have produced the device hereinafterdescribed and claimed.

In the drawings, A is the pipe by which steam or air under pressure or amixture of steam and air is conducted to a nozzle which is situatedwithin the furnace and above the grate. Upon the end of the pipe A andinside the fire-space of the furnace, but preferably close inside thefront wall thereof, is the nozzle B, provided with the dependingwater-holding tube or cup B, and having, above the level of the top ofthe cup, a series of perforations 1) through which the injected steam orair or the mixture thereof passes into the furnace. The water-holdingcup B is made of sufficient depth and diameter to hold a body of water,and this will vary in quantity according to the size of the furnace andthe heat maintained therein. I have found in several instances that acup of from four to six inches in depth and of a diameter of aboutthree-fourths of an inch to one inch holds sufiicient water for mypurposes; but where very high heats are maintained and a large quantityof oxidizing vapor or gas is necessary these sizes may beproportionately increased.

Outside of the furnace a pipe 0 is connected from a suitable watersupply, such as the tank 0 Fig. 5, to the pipe A, and in said pipe 0 isplaced a suitable check-valve 0, whereby back pressure from the pipe Awill close the valve. A constant but slow feed of water is provided intothe pipe 0, which, in

some instances of use by me, has been at the rate of from one to threedrops a second. A suitable regulating device is provided in the pipe 0,such as the valve 0 This water supply flows into the pipe A and thenceinto the cup or pocket B. The furnace D is provided with a regulatingapparatus, such as is well known, (for instance, such as is set forth inmy Patent No. 510,631,) whereby, by

the opening of the furnace-door, a blast of oxidizing vapor or gas isturned on in the pipe A, and the blast is continued for a predeterminedperiod after the door is closed.

In the circuit of pipe A A are interposed two connections b 19 which areelectric insulators whereby that portion of the pipe A between saidinsulators is electrically disconnected from the remainder of thepipe-circuit. A spring 6 is attached to the front plate of the furnace,which, when the door D is opened,makes an electrical contact with thepipe A between the insulators b 5 but when the door D closes the spring12 is moved away from the pipe and the contact is broken. A valve G isplaced in the circuit of pipe and adjacent thereto is an electricalmotor E of any suitable form. Upon the main shaft 6 of said motor is awheel e, provided with an insulating spot e and an insulated cam 6 A F,or other suitable source of electrical en-.

ergy, drives the motor E. A rheostat H is introduced into the circuitpassing throughthe motor, whereby the rate of revolution of the motormay be varied,if desired. The battery F has the following connections:The connection f to the motor is constant from one pole of the battery.The other pole of the battery is connected by the wire f to the circuitof pipe A A, outside of the portion between the insulators 17 Therheostat H maybe interposed in thewire f. From the connection 2 5 f aside connection f runs to the insulated contact-spring e. That portionof the pipe A between the insulators b b is also connected to the motorE, as by the wire f The whole device is at rest, as shown in Fig. 5. Thecon tactespring e rests upon the insulating spot e and the spring 19 isout of contact with the pipe A. The furnace-door is now opened forsupplying fuel to the grate and the furnace is then electricallyconnected with that part of the pipe A between the insulators b b Thecurrent passes from the battery F through the connection f, into andthrough the motor; thence through the wire f into the insulated part ofthe pipe A; thence through the spring 12 to the furnace; thence throughthe circuit of pipe outside of said insulated part, and thence throughthe wire f to the battery. The motor E revolves and the contact-spring 6passes off from the insulated spot e on the wheel e. As soon as thecontact-spring (2 comes into contact with the uninsulated portion of thewheel e, a new set of connections is set up. The stoking of the furnacehaving been finished, the door 1) may be closed, thus breaking theconnection between the spring 19 and the pipe A.

The current from the batterynow passes into the motor through the wiref; thence through the shaft 6 into the wheel 6; thence throughthecontact-strip e and the side connection f into the connection f, andthence to the battery. The revolution of the motor continues until theinsulated spot breaks the connection between the wheel 6 and thecontact-spring e whereupon the motor stops. The cam e is so set upon theshaft of the motor that, when the motor is at. rest with thecontactspring 6 upon the insulated spot 6 the valve is completely closedand the supply of steam to the nozzle is cut ofi. The revolution of themotor begins to open the valve G as soon as the door D is opened,thereby admitting a jet of vapor or steam into the firespace. I'Vhen thestoking is completed, the door is closed and the valve remains, openuntil the motor E has caused one complete revolution of the cam E. Atthe end of said revolution of the cam,the valve is again closed.trolling a supply of vapor or gas by the opening and closing of thefurnace-door.

Upon opening the furnace-door D, a blast of steam, or of air, or ofmixed steam and air, is turned on in the pipe A, and the same isdistributed over the fire-space through the perforations b of the nozzleB. A charge of fuel is placed upon the grate, the furnacedoor is closed,and, after the interval for which the apparatus is set, the blast isshut off in the pipe A. During the period of injection of the oxidizingvapor or gas, the nozzle 13 is kept cooler than the temperature of thefire-space by reason of its containing the constantly-flowin g stream ofvapor or gas, but as soon as this blast or stream is turned off, thenozzle would, under ordinary circum stances, immediately become highlyheated and would melt or crack, or become otherwise seriously damaged inconsequence. As soon as the blast is shut off water from the watersupply flows through the pipe 0 and through the pipe A into the cup B,and boiling therein keeps the whole of the tip or nozzle at atemperature lower than one at which the deleterious efiects abovementioned are produced. The flow of water through the pipe 0 is stoppedwhenever the steam-pressure in the pipe A at the point of union of thepipe 0 with the pipe A is suflicient to operate as an overbalaneing backpressure upon the check-valve C. There is therefore an alternation ofthe blast in the pipe A and of the flow of water into the cup B. Thecondensation of steam in the pipe'A supplies water to the cup B duringthe continuance of the blast. The cup B is preferably made of wroughtiron.

I do not limit my broad claims to any specific form of nozzle, providedthe same has a water-holding cup attached thereto located inside thefurnace, so that steam may be generated from the Water contained in thesame.

It will be seen that the boiling of the water Thus I rovide a mechanismfor con-] use, the perforations I) remain clean, and

this cleanness I attribute, in considerable part, to the efiect of thesteam arising from the boiling water in the pocket B.

What I claim is- 1. In a smoke-consuming furnace, a pipe conducting asupply of oxidizing vapor or gas into. the fire-space, a nozzle on saidpipe havingawater-cuplocated inside the furnace whereby steam may begenerated from the,

water contained in said cup, and a water supply to said cup independentof the supply of oxidizing vapor or gas.

2. In a smoke-consuming furnace, a pipe extending into the fire-spaceand connected with a source of supply of oxidizing vapor or gas, anozzle on said pipe having a water-cup located inside the furnacewhereby steam may be generated from the water contained in said cup,said cup being below the orifice of said nozzle, and a water supplyleading to said cup and adapted to feed water thereinto when said supplyof vapor or gas is shut off;

3. In a smoke-consuming furnace, a pipe conducting oxidizing vapor orgas into the fire-space, a nozzle on said pipe havinga water-cup locatedinside the furnace whereby steam may be generated from the waterconrained in said cup, means for supplying wa ter to said cup, means forsupplying oxidizing vapor or gas to said pipe and means for controllingsaid supply of water and said supply of vapor or gas whereby the sameare alternately turned on and shut ofi, the said supply of vapor or gasbeing controllable by opening and closing the furnace-door.

4. In asmoke-consuming furnace, a pipe conducting oxidizing vapor or gasinto the fire-space, a nozzle on said pipe having a water-holding cuplocated inside the furnace whereby steam may be generated from the watercontained in said cup, means for supand said supply of oxidizing vaporor gas controllable by opening and closing the furnace-door.

5. In a smoke-consuming furnace, the pipe conducting oxidizing vapor orgas into the fire-space, means controllable by opening and closing thedoor for turning on and shutting off said supply of vapor or gas, awater supply to said pipe independent of the means for controlling saidsupply of vapor or gas, a nozzle on said pipe located Within the furnaceand having a dependent tubular water-cup whereby the water therein isgenerated into steam, and a check-valve in the water-supply pipe,whereby the check-valve is closed when the supply of vapor or gas isturned on and opens to admit water to said water-cup when the supply ofvapor or gas is turned off.

WILLIAM L. DENIO. Witnesses:

E. H. MARSELLUS, CHAS. M. WILLIAMS.

